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High response organic deep ultraviolet photodetector with PEDOT:PSS anode

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Abstract

We have fabricated an organic deep ultraviolet photodetector (PD) using PEDOT:PSS (PH 1000) as a transparent anode. NPB and PBD were employed as electron donor and acceptor, respectively. The PD exhibits a dark current of 0.0829μA/cm2 and a photocurrent of 85.3μA/cm2 at 12V under 280nm light illumination with an intensity of 0.488mW/cm2. A high response at 248370nm with its peak of 0.18A/W at 280nm and a detectivity of 1.1×1012cmHz1/2W1 were achieved. The more detailed mechanism of harvesting high performance and the dependence of photocurrent density on illumination intensity are also discussed.

© 2011 Optical Society of America

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